Madhya Pradesh is a major producer of this Rabi crop:

The correct answer is D. Madhya Pradesh is a major producer of all of the Rabi crops mentioned in the question: wheat, mustard, and gram.

Wheat is a major cereal crop grown in Madhya Pradesh. It is a winter crop, which means it is planted in the fall and harvested in the spring. Wheat is a staple food in India, and Madhya Pradesh is one of the top producers of wheat in the country.

Mustard is a major oilseed crop grown in Madhya Pradesh. It is a winter crop, which means it is planted in the fall and harvested in the spring. Mustard is used to make oil, which is used in cooking and other applications.